Topic ID: reference_x1b_pdm_zkb
Version: 2.0
Date: Jun 10, 2020 2:27:59 AM

CFC (Common Fan Controller) Troubleshooting (5447103-2)

1 CFC Switch

Set S1_SERVICE to ON, CFC will work on service mode, and control top fans, heater and blower manually by setting corresponding key.

Table 1. S1 Switch
Switch	States	Description
Service	OFF	Normal mode
Service	ON	Service mode
Blower (works only when S1_Service is on)	OFF	Blower off
Blower (works only when S1_Service is on)	ON	Blower on
Heater (works only when S1_Service is on)	OFF	Heater off
Heater (works only when S1_Service is on)	ON	Heater on
FAN_1 (works only when S1_Service is on)	OFF	FAN1 off
FAN_1 (works only when S1_Service is on)	ON	FAN1 half speed on
FAN_2 (works only when S1_Service is on)	OFF	FAN2 off
FAN_2 (works only when S1_Service is on)	ON	FAN2 half speed on
NC	Reserved
Debug	Reserved debug switch

2 LEDs

Check states of CFC working by observing DS1~DS15.

Table 2. LEDs
LEDs	State	Description
DS1	Service	Light when CFC working on service mode
DS2	Debug	Light when CFC working on debug mode
DS3	Blower	Light when blower in on
DS4	Heater	Light when heater is on
DS5	FAN_1	TBD
DS6	FAN_2	TBD
DS7	Diagnostic	Light when CFC is doing diagnostic
DS8	On the Box Silkscreen	Blink if FPGA works normal state in frequency 1 second
DS9	On the Box Silkscreen	Light if board 3.3V is on
DS10	On the Box Silkscreen	Light if board 2.5V is on
DS11	On the Box Silkscreen	Light if FAN1 power 24VA is on
DS12	On the Box Silkscreen	Light if FAN2 power 24VB is on
DS13	On the Box Silkscreen	Light if FAN3 power 24VC is on
DS14	On the Box Silkscreen	Light if FAN4 power 24VD is on
DS15	On the Box Silkscreen	Light if board 24V is on

3 Test Points

Table 3. Test Points
Point Sorts	Description
Power Test Points	TP17 (24V), TP18 (3.3V), TP19 (1.2V), TP20 (2.5V)
Ground Test Points	TP11, TP12
Signal Test Points	TP1 (Heater), TP2 (Blower), TP7 (FAN1_CTL), TP8 (FAN2_CTL), TP9 (FAN3_CTL), TP10 (FAN4_CTL)